No, it is a sentence. There is no preposition among those four words.
grocer
sells food
Could be Grocer, a dealer in foodstuffs and household supplies
A grocer, or greengrocer.
a green grocer
a grocer is one who buys goods in bulk and then sells them.so we can buy almost all daily need products ranging from tea,coffee to dals,spices.
A person who sells food and small household goods
grocer or purveyorA greengrocer or fruiterer.
UK : Greengrocer - US : Grocer
Starbucks sells the most coffee. They are the largest coffee company in the world.
obviously.it sells coffee
A person that runs a business that sells food is considered to be a grocer. The definition varies between countries and can also include selling more than food items.